全文获取类型
收费全文 | 1118篇 |
免费 | 85篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 61篇 |
妇产科学 | 16篇 |
基础医学 | 125篇 |
口腔科学 | 37篇 |
临床医学 | 128篇 |
内科学 | 271篇 |
皮肤病学 | 49篇 |
神经病学 | 60篇 |
特种医学 | 140篇 |
外科学 | 76篇 |
综合类 | 53篇 |
预防医学 | 79篇 |
眼科学 | 12篇 |
药学 | 73篇 |
中国医学 | 3篇 |
肿瘤学 | 30篇 |
出版年
2023年 | 8篇 |
2022年 | 5篇 |
2021年 | 17篇 |
2020年 | 16篇 |
2019年 | 23篇 |
2018年 | 18篇 |
2017年 | 19篇 |
2016年 | 18篇 |
2015年 | 27篇 |
2014年 | 31篇 |
2013年 | 44篇 |
2012年 | 30篇 |
2011年 | 20篇 |
2010年 | 56篇 |
2009年 | 42篇 |
2008年 | 30篇 |
2007年 | 42篇 |
2006年 | 31篇 |
2005年 | 30篇 |
2004年 | 22篇 |
2003年 | 32篇 |
2002年 | 26篇 |
2001年 | 25篇 |
2000年 | 22篇 |
1999年 | 22篇 |
1998年 | 49篇 |
1997年 | 40篇 |
1996年 | 38篇 |
1995年 | 28篇 |
1994年 | 38篇 |
1993年 | 34篇 |
1992年 | 17篇 |
1991年 | 21篇 |
1990年 | 14篇 |
1989年 | 27篇 |
1988年 | 19篇 |
1987年 | 23篇 |
1986年 | 26篇 |
1985年 | 21篇 |
1984年 | 12篇 |
1983年 | 13篇 |
1982年 | 15篇 |
1981年 | 11篇 |
1980年 | 15篇 |
1978年 | 7篇 |
1977年 | 14篇 |
1976年 | 12篇 |
1975年 | 9篇 |
1972年 | 4篇 |
1971年 | 4篇 |
排序方式: 共有1218条查询结果,搜索用时 15 毫秒
1.
Prednisone induced reductions in the circulating human T cell population follow a characteristic time curve which persists even after a single daily dose of oral prednisone has been administered many times. If prednisone doses are administered every 6 h, so that a dose occurs near the point of maximum response from a previous dose (4-6 h), the reduction in size of the circulating T cell population will persist so long as administration of prednisone continues. A chronically depressed ratio of OKT4+ to OKT8+ cells is observed in most patients when as little as 2.5 mg of prednisone is administered every 6 h. 相似文献
2.
3.
4.
GP SCHWAB AL BLUM E BODNER B DALLEMAGNE K GLASER H KOOP F PACE W RÖSCH JR SIEWERT G WETSCHER 《Journal of gastroenterology and hepatology》1997,12(12):785-789
Gastroesophageal reflux disease (GERD) is the most common disease of the upper gastrointestinal tract. With the introduction of proton pump inhibitors medical treatment of GERD has been significantly improved. However, the development of laparoscopic antireflux surgery resulted in an increasing interest of surgeons in this disease. An interactive meeting was organized in order to develop an agreement between gastoenterologists and surgeons regarding therapeutic decisions and this is the main topic of this paper. 相似文献
5.
Jan McGregor Hepburn 《British Journal of Psychotherapy》1992,9(1):24-32
ABSTRACT. This paper is an attempt to think about a process and experience which is essentially before thinking in its origins; that is to say, the maternal experience of holding the baby in mind and the baby's experience of being held. I have looked at the issue subjectively and anecdotally, for which in the end I make no apology as I can see no other way to proceed, at least in the first instance; and I want to think about how this thinking applies to the practice of psychoanalytic psychotherapy. 相似文献
6.
7.
8.
9.
Betapol consists of triglyceride fatty acids commonly found in vegetable and animal fats. A similarity to human milk fat indicated a potential use in infant formulae as well as for food use in general. To test the potential for substantial equivalence with a related food grade oil, palm oil, Betapol was fed to rats at 15% content in the diet using an augmented two-generation study, in order to obtain information on general (6 months), reproductive and postnatal developmental toxicity in a single study rather than separate studies. For comparison there were two control groups, namely a comparative control fed a diet containing 15% of food grade oil and a negative, or laboratory standard control fed a commercial rodent breeding diet (LAD), containing 2.3-4.7% fat. It was reasoned that if Betapol fed groups showed differences from the comparative control in the direction of the negative control these would reflect differences in the nutritional value of the high fat diets. Presence of a toxicant might be indicated by differences from the comparative control group opposite to the negative control group. The group fed 15% Betapol showed occasional, statistically significant differences from the comparative control group but the direction of difference was towards the negative control group and did not indicate the presence of an unexpected toxicant. 相似文献
10.